16 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Spencer | 1 | 508 | 566 | -2.31% | 7 | 74 | Township |
| Spencer | 2 | 365 | 403 | -1.62% | 610 | 1 | Village |
| Butte | 3 | 355 | 390 | -2.2% | 6 | 64 | Township |
| Butte | 4 | 263 | 281 | -1.13% | 560 | 0 | Village |
| Lynch | 5 | 216 | 237 | -1.82% | 5 | 41 | Township |
| Basin | 6 | 197 | 219 | -2.48% | 2 | 129 | Township |
| Lynch | 7 | 179 | 194 | -1.1% | 335 | 1 | Village |
| Bristow | 8 | 95 | 105 | -2.06% | 3 | 33 | Township |
| McCulley | 9 | 82 | 97 | -4.65% | 2 | 53 | Township |
| Morton | 10 | 81 | 94 | -3.57% | 2 | 52 | Township |
| Naper | 11 | 80 | 88 | -1.23% | 593 | 0 | Village |
| Bush | 12 | 69 | 75 | -1.43% | 1 | 55 | Township |
| Bristow | 13 | 65 | 71 | -1.52% | 399 | 0 | Village |
| Anoka | 14 | 9 | 11 | 0% | 16 | 1 | Village |
| Gross | 15 | 2 | 2 | 0% | 16 | 0 | Village |
| Monowi | 16 | 2 | 2 | 0% | 9 | 0 | Village |
Spencer is the largest city in Boyd County, with a population of 508.
Monowi is the smallest city in Boyd County, with a population of 2.
There are 16 cities in Boyd County, Nebraska.